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- This is a collection of 1128x832 ray-traced images. Snail4 and Mirror are
- my own compositions and the others are demos that accompanied the tracers.
- Please don't deluge me with mail asking for the ray-tracers. I have made
- a few small modifications to them to allow them to live more comfortably in
- the NeXT environment, and I will post them presently. In the meantime,
- uncompress these images, and view them with Scene or whatever tiff viewer
- you like. They are all 2 bits per pixel, so color voyeurs will be
- disappointed, but they look pretty good to me.
-
- The tracers used were:
-
- rayshade3.0 (patch level 5) from weedeater.yale.math.edu
- dkbtrace (version 2.0) from cs.uoregon.edu
-
- (and a third proprietary tracer from the Ballistic Research Lab,
- which runs under X-windows on my NeXT. If you want it, ftp
- to vgr.brl.mil and read the notes there. DON'T send me mail
- asking how to get it.)
-
- All of the tracers are more powerful than the Ray.app demo, have
- better scene description file formats and comparable speed.
-
- Snail4 is my attempt to duplicate an image I once saw in a Scientific
- American magazine. It consists of overlapping spheres tracing
- a logarithmic spiral (I tested the spiral shape using SpaceCurve in
- Mathematica), and with a radius proportional to the location on the curve.
-
- Mirror4 is a mirrored room with a soap bubble in the corner, one marble wall,
- and a spline surface in the center which I unfortunately had to render
- with small polygons. I would far prefer a tracer that handles B-spline
- surfaces directly! Anyone have one? (The proprietary tracer actually
- does do this, but its file format is a disaster).
-
- Use these images in any way you want, except commercially. Please distribute
- with this README file intact.
-
- I would like to hear from anyone who makes good ray-traced pictures and wishes
- to exchange files, tracers, or images.
-
- Shane Artis
-
- shanega@athena.mit.edu
-